Czechoslovakia refuses to implement the Munich Agreement, because it has got strong guarantees of military backing from the Soviet Union. Germany declares war on Czechoslovakia, soon followed by Hungary. The USSR decides to send troops to Czechoslovakia, asks Poland and Romania for right of passage, and declares war to Germany & Hungary. Britain and France, true to their word at Munich, and worried at seeing the Red Army in Central Europe, remain neutral. Poland, scared at seeing the Red Army crossing its territory and deployed all along along its southern border, and eager to get its share of Czechoslovakia, refuses passage to the Soviets. Stalin orders the Red Army to force Polish borders open, and Poland declares war to Moscow and Prague. Yugoslavia decides to be true to its alliance to Czechoslovakia. Mussolini, always eager to join an anticommunist crusade and grab long-standing Italian claims in Yugoslavia, declares war to Belgrad and Moscow. Romania wavers between conflicting alliance committments to Czechoslovakia and Poland, refuses passage to the Soviets as well, but eventually decides that the USSR is the bigger threat, and joins the anti-Soviet coalition.